9ed0985332
Commitb9c273babc("PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface") caused kernels built with CONFIG_PM unset to crash on systems supporting the Performance and Energy Bias Hint (EPB), because it attempts to add files to sysfs directories that don't exist on those systems. Prevent that from happening by taking CONFIG_PM into account so that the code depending on it is not compiled at all when it is not set. Fixes:b9c273babc("PM / arch: x86: MSR_IA32_ENERGY_PERF_BIAS sysfs interface") Reported-by: Ido Schimmel <idosch@mellanox.com> Tested-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Ingo Molnar <mingo@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.